Garden tool

ABSTRACT

A garden tool, including a main body, a walking wheel mounted on the main body, a self-propelled motor for driving the walking wheel, and a control panel disposed on the main body. The control panel includes a self-propelled control assembly. The self-propelled control assembly includes a self-propelled start paddle and a speed regulating button. Pressing the self-propelled start paddle activates self-propelled operation of the garden tool. The self-propelled start paddle can be released for a short time and the speed regulating button can be adjusted within the short time. The self-propelled start paddle can be re-pressed within the short time and after the speed regulating button is adjusted, and the garden tool maintains the self-propelled operation.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.16/715,238 filed on Dec. 16, 2019, which claims priority to CN PatentApplication Serial No. CN201811533580.5 filed on Dec. 14, 2018, thedisclosures of which are hereby incorporated by reference in theirentirety.

TECHNICAL FIELD

The present invention relates to a garden tool, in particular to agarden tool having a simple control structure which is safe andconvenient.

BACKGROUND ART

With the continuous improvement of living standards and the need tobeautify the environment, the area of lawn use has increased rapidly.Whether it is municipal, residential, football fields, golf courses,etc., the lawn maintenance work has doubled. Garden tools such as lawnmowers play an important role in lawn maintenance work as a greenmaintenance facility. The existing garden tools in the market,especially the push-back garden tools, are provided with an obliquelyextending push rod structure behind the main body of the garden tool. Inorder to reduce the operator's fatigue, a self-propelled drive mechanismis generally equipped, and the self-propelled drive mechanism transmitsthe power of the mower engine from the transmission belt to theself-propeller assembly through the combination or separation of theclutch device in the self-propeller assembly to achieve theself-propelling or stopping of the mower. After the self-propelled driveis added, the control structure of the garden tool becomes morecomplicated and ease to cause confusion. Moreover, the operator needs tograsp the push rod with both hands. When the operator lose the rodunintentionally due to negligence, it needs to be restarted, which isinconvenient to control garden tools.

Therefore, existing garden tools need to be improved to overcome theabove-mentioned deficiencies.

SUMMARY OF INVENTION

The purpose of the invention is to provide a garden tool with a simplecontrol structure which is safe and convenient.

In order to achieve the above-mentioned object, the invention provides agarden tool which comprises a main body, a walking wheel mounted on themain body and a control panel disposed on the main body, wherein thecontrol panel comprises a main blade control assembly. The main bladecontrol assembly comprises a main blade button and a main blade pullrod. When starting the garden tool, the two actions of starting the mainblade button and starting the main blade pull rod can be performed atintervals, but it needs to be completed within a certain time.

Further, said main blade control assembly comprises a first main bladecontrol switch connected to the main blade button, a second main bladecontrol switch connected to the main blade pull rod, a button returnspring, a rod clamp and a clamp return spring; the starting of thegarden tool requires the main blade button and the main blade pull rodto respectively control the first main blade control switch and thesecond main blade control switch to send signals; the main blade buttonis a point-touch type. And when there is no external force, the buttonreturn spring and the clamp return spring make the main blade button inthe up state, and the main blade pull rod returns.

Further, the main blade pull rod needs to be kept in the on state duringthe working process, and the garden tool stops working regardless of thestate of the main blade button after the main blade pull rod isreleased.

Further, said control panel is further provided with a self-propelledcontrol assembly, and said self-propelled control assembly comprises aself-propelled start paddle and a speed regulating button. After theself-propelled start paddle is turned on, the self-propelled startpaddle can be released during the self-propelled process. The speedregulating button is adjusted in a short time, and the self-propelledstart paddle is re-pressed after the adjusted, and the garden tool cankeep self-propelled.

Further, said self-propelled control assembly comprises a self-propelledswitch connected to the self-propelled start paddle, a potentiometerconnected to the speed regulating button, and a paddle return spring.The self-propelled switch sends a signal to start the self-propelledmotor, and the elastic force of the paddle return spring causes theself-propelled start paddle to return to the initial position, and theself-propelled motor stops running; the speed regulating button isprovided with teeth, and the teeth of the speed regulating button areconnected to the speed regulating pinion connected to the potentiometer.

Further, the self-propelled control assembly further comprising adamping spring. Said damping spring is fixed at one end, and the otherend is extended between the teeth of the speed regulating button. Theother end of the damping spring causes the speed regulating button to betouched when adjusting the speed regulating button.

Further, said control panel is mounted on the main body by a push rod,which comprises an upper panel and a lower panel. Said upper panel andsaid lower panel together form a mounting portion for mounting thecontrol panel on said push rod and a receiving portion for mounting themain blade control assembly and the self-propelled control assembly.

Further, said receiving portion is provided with a first cavity and asecond cavity above said first cavity, wherein said first cavity isformed by said upper panel and said lower panel. Said main blade controlassembly is located in said first cavity; an upper cover is disposedabove the upper panel, said second cavity is formed by the upper coverand the upper panel, and the self-propelled control assembly is locatedin the second cavity. The main blade button, the main blade pull rod,the self-propelled start paddle and the speed regulating button are alllocated on the side of the control panel facing the operator of thegarden tool.

Further, said self-propelled start paddle and said main blade pull rodare pivotally connected to the control panel, and the starting of bothof them are rotating in a direction closer to each other. Theself-propelled start paddle, the main blade pull rod and the push rodare arranged close to each other, so that the operator can grasp thethree at the same time.

Further, said main body comprises a main blade, a motor for driving themain blade, a self-propelled motor for driving the walking wheel, and apower supply for supplying power to the motor. And said control panelcontrols the work of the self-propelled motor and the motor.

The beneficial effects of the present invention are: when starting thegarden tool, the two actions of starting the main blade button andstarting the main blade lever can be performed at intervals, but itneeds to be completed within a certain time, thereby ensuring thesimplicity of operation and the safety of operation.

DRAWINGS

FIG. 1 is a perspective view of the lawn mower of the presentembodiments.

FIG. 2 is an exploded perspective view of the control panel in FIG. 1 .

FIG. 3 is a perspective assembled view of the control panel and the pushrod in FIG. 1 .

FIG. 4 is an assembly schematic view of the main blade control assemblyafter removing the lower panel.

FIG. 5 is an assembly schematic view of the main blade control assemblyafter removing the upper panel.

FIG. 6 is an assembly schematic view of the self-propelled controlassembly after removing the upper cover.

FIG. 7 is an assembly schematic view of the self-propelled controlassembly from another angle.

FIG. 8 is a partial cross-sectional view of the self-propelled startpaddle in the initial position before pressed.

FIG. 9 is a partial cross-sectional view of the self-propelled startpaddle touching the self-propelled switch after pressed.

DESCRIPTION OF EMBODIMENTS

In order to make the objects, technical solutions and advantages of thepresent invention more clearly, the present invention will be describedin detail below with reference to the drawings and specific embodiments.

It is also to be noted that, in order to avoid obscuring the inventionin unnecessary detail, only the structures and/or processing stepsclosely related to the aspects of the present invention are shown in thedrawings, and other details not relevant to the present invention isomitted.

In addition, it should be noted that the terms “comprise”, “comprising”or any other variation thereof are to cover non-exclusive inclusions,such that a process, method, article, or device that comprises aplurality of elements comprise not only those elements but also otheritems not specifically listed, or elements that are inherent to such aprocess, method, item, or device.

The present invention relates to a garden tool, which is a lawn mower inone embodiment, as shown in FIG. 1 and FIG. 3 . The lawn mower 100comprises a main body 10, a walking wheel 20 mounted on the main body10, a push rod 30 that is disposed behind the main body 10 and extendsobliquely upward, and a control panel 40 that controls the operation ofthe lawn mower 100. The main body 10 comprises a main blade for cuttingthe lawn, a motor for driving the main blade, a self-propelled motor fordriving the walking wheel, and a power supply for supplying power to themotor. The push rod 30 is U-shaped, comprising a pair of side rods 31and an upper push rod 32 connecting to the pair of side rods 31. Theupper push rod 32 has a three-stage structure. It is easy to operate andgrasp for the operator as an operating portion. The control panel 40 hasan inverted T-shaped structure and is fixed to the push rod 30. Thecontrol panel 40 comprises a laterally extending mounting portion 41mounted on a pair of side bars 31 and a receiving portion 42 extendingrearward from the central portion of the mounting portion 41. Thecontrol panel 40 is disposed near the top of the push rod 30, and thereceiving portion 42 of the control panel 40 is disposed adjacent to theupper push rod 32.

As shown in FIG. 2 to FIG. 5 , the control panel 40 comprises an upperpanel 50, a lower panel 60, a main blade control assembly 70, and aself-propelled control assembly 80. The receiving portion 42 comprises afirst cavity 43 and a second cavity 44. The first cavity 43 is formed bythe upper panel 50 and the lower panel 60, and the main blade controlassembly 70 of the lawn mower 100 is mounted within the first cavity 43.The main blade control assembly 70 comprises a main blade button 71 anda first main blade control switch 72 connected to the main blade button71, a main blade pull rod 73, and a second main blade control switch 74connected to the main blade pull rod 73. The first main blade controlswitch 72 is controlled by a main blade button 71 which reciprocate inthe axial direction of the control panel 40, and the main blade button71 is fixed to the lower panel 60 with a pressure plate 75. A buttonreturn spring 76 is located between the main blade button 71 and thefirst main blade control switch 72, and the main blade button 71 is in apop-up state without external force. The main blade button 71 is apoint-touch type. When the main blade button 71 is pressed at the start,the first main blade control switch 72 is activated to send a signal,and then the main blade button 71 can be released, which is rebounded bya button return spring 76.

For the operator's operational comfort, the shape of the main blade pullrod 73 matches the upper push rod 32 of the push rod 30, and is also athree-stage structure. A pull rod clamp 77 is located between the mainblade pull rod 73 and the second main blade control switch 74. The mainblade pull rod 73 is provided with a clamp return spring 78. When themain blade pull rod 73 is released, the clamp return spring 78 is exertsa force on the pull rod clamp 77, abutting against the pull rod clamp 77to be separated from the second main blade control switch 74, and themain blade pull rod 14 is separated from the upper push rod 32 of thepush rod 30 to return.

When the lawn mower is started, it needs to touch the main blade button71 and pull the main blade pull rod 73 to control the first main bladecontrol switch 72 and the second main blade control switch 73 to sendsignals. In the present invention, both the start of the main bladebutton 71 and the activation of the main blade pull rod 73 can bestarted within a certain period of time (preferably 5 s). Specifically,after the main blade button 71 is pressed, the first main blade controlswitch 72 sends a signal to the control panel, and when the main bladepull rod 73 is attached to the upper push rod 32 of the push rod withina certain time, the main blade motor of the lawn mower 100 is started,and driving the main blade to rotate. After the specified time isexhausted, even the main blade pull rod 73 is pulled, the main blademotor cannot be started. And the main blade button 71 needs to betouched again, and the main blade pull rod 73 is pulled again, then themain blade motor can be started.

In the present invention, the two actions of touching the main bladebutton 71 and pulling the main blade pull rod 73 are in no particularorder, and the first main blade control switch 72 and the second mainblade control switch 73 both need to be triggered to start the mainblade. After started, the main blade button 71 does not need to bepressed all the time as it is touch type, the main blade pull rod 74needs to be kept pulled, and after the main blade pull rod 73 isreleased, the lawn mower 100 stops working regardless of the state ofthe main blade button 71. This setting ensures the simplicity and thesafety of operation.

Referring to FIG. 2 and FIG. 6 to FIG. 9 , an upper cover 51 is disposedabove the upper panel 50, and a second cavity 44 is formed between theupper cover 51 and the upper panel 50. The second cavity 44 is locatedabove the first cavity 43 for mounting and receiving the self-propelledcontrol assembly 80. The self-propelled control assembly 80 comprises aself-propelled start paddle 81, a self-propelled switch 82 connected tothe self-propelled start paddle 81, a speed regulating button 83, and apotentiometer 84 connected to the speed regulating button 83. Theself-propelled start paddle 81 is pivotally coupled to the control panel40, and a paddle return spring 85 is disposed between the self-propelledstart paddle 81 and the control panel 40. When the self-propelled startpaddle 81 is pushed forward, the self-propelled start paddle 81 touchesthe self-propelled switch 82, and the self-propelled switch 82 sends asignal to the control panel to activate the self-propelled motor. Whenthe self-propelled start paddle 81 is no longer pressed, the elasticforce of the paddle return spring 85 causes the self-propelled startpaddle 81 to return to the initial position, and the self-propelledmotor stops working.

The speed regulating button 83 has teeth thereon, and the speedregulating button 8 is connected with a speed regulating pinion 86connected to the potentiometer 84. By adjusting the speed regulatingbutton 83, the signal output from the potentiometer 84 to the controlpanel can be adjusted. Thereby, the self-propelled speed of the lawnmower 100 is adjusted. In the present embodiment, the self-propelledspeed can be adjusted, and the self-propelled speed can be adjustedbefore the self-propelled start paddle 81 is pressed or after theself-propelled start paddle 81 is pressed. During the self-propellingprocess, the self-propelled start paddle 81 can be released, and in ashort time (preferably 1.5 s), the speed regulating button 83 isadjusted, the self-propelled motor is still running normally, and afteradjusting the speed regulating button 83, the self-propelled startpaddle 81 is pressed again, and the self-propelled motor continues torun. During this process, the garden tool can keep self-propelled. Ifthe self-propelled start paddle 81 is released for more than 1.5seconds, since the control panel neither detects the signal of thepotentiometer 84 nor detects the signal of the self-propelled switch 82,the self-propelled motor immediately stops working.

Preferably, a damping spring 87 is further mounted in the second cavity44 between the upper cover 51 and the upper panel 50. The one end ofdamping spring 87 is fixed at the upper panel 50 and the other end isextended between the teeth of the speed regulating button 83. When thespeed regulating button 83 is adjusted, the end of the damping spring 87causes the speed regulating button 83 to be activated, so that there isa sense of manipulation when adjusting. If there is no damping spring87, the mounting clearance of the speed regulating button 83 ensures thetightness of the movement of the speed regulating button 83 with themounting clearance of the upper cover 51, the upper panel 50 and theself-propelled paddle 81. If it is too loose, the speed regulatingbutton 83 will rotate by itself when the whole machine is vibrating; ifit is too tight, it will not move or feel bad; and the inventionincludes the damping spring 87, which can not only prevent non-operatingrotation of the speed regulating button 83, but also ensures the safetyof the operation.

In the present invention, the main blade control assembly 70 and theself-propelled control assembly 80 are mounted in the receiving portion42 of the control panel 40. The main blade button 71, the main bladepull rod 73, the self-propelled start paddle 81 and the speed regulatingbutton 83 are all disposed on the side of the control panel 40 facingthe operator of the garden tool, and the entry surface forms amanipulation zone. The control panel 40 is provided with two openings onthe side facing the garden tool operator, specifically a first opening61 disposed on the lower panel 60 and a second opening 52 disposed onthe upper panel 50. The main blade button 71 and the speed regulatingbutton 83 are disposed in the first opening 61 and the second opening52, respectively. The self-propelled start paddle 81 and the main bladepull rod 73 are pivotally coupled to the control panel 40. The mainblade button 71 is located at the lower portion of the manipulationarea, the speed regulating button 83 is located at the middle of themanipulation area, and the self-propelled start paddle 81 and the mainblade pull rod 73 are located at the upper portion of the manipulationarea. Further, the self-propelled start paddle 81, the main blade pullrod 73 and the upper push rod 32 are disposed adjacent to each other, sothat the operator can grasp the three at the same time andsimultaneously control the self-propelled start paddle 81 and the mainblade pull rod 73. At the time of starting, the self-propelled startpaddle 81 and the main blade pull rod 73 rotate in a direction close toeach other. Referring to FIG. 5 together, the main blade pull rod 73rotates backward in the F1 direction, and the self-propelled startpaddle 81 is oriented in the F2 direction, rotates to move forward, theoperator can start both at the same time when gripping, without making abig move.

When the lawn mower is started, the main blade button 71 can be pressedfirstly, and the main blade pull rod 73 can be pulled to fit the pushrod 30 for a certain period of time. Alternatively, the main blade pullrod 73 can be pulled to fit the push rod 30, and then the main bladebutton 71 is pressed. After the first main blade control switch 72 andthe second main blade control switch 74 are successively triggered in acertain period of time, the main blade motor of the lawn mower 100 isstarted to drive the main blade to rotate. When the self-propelledmechanism is started, the self-propelled start paddle 81 is pushedforward in the power-on state of the whole machine, and the startingboss 810 of the self-propelled start paddle 81 is started to the contact820 of the self-propelled switch 82, and the self-propelled switch 82 isclosed and powered on. At this time, the self-propelled motor startsworking. If it is necessary to adjust the walking speed of the machine,push the speed regulating button 83 to the left or right. The gears ofthe speed regulating button 83 and the speed regulating pinion 86connected to the potentiometer 84 are combined by the tooth shape toadjust the resistance value to change the rotation speed of theself-propelled motor, so as to change the speed of self-propelledwalking. When the self-propelled start paddle 81 is released, theself-propelled start paddle 81 is returned to the home position by thepaddle return spring 85, the self-propelled switch is disconnected, andthe self-propelled system stops working.

The invention integrates the self-propelled control assembly and thecontrol assembly of the functional component of the garden tool, mountsthem on the receiving portion of the control panel, and sets themanipulation area on the side of the control panel facing the operator.And the main blade button 71, the main blade pull rod 73, theself-propelled start paddle 81 and the speed regulating button 83 aredisposed close to each other, in particular, the main self-propelledstart paddle 81, the main blade pull rod 73 and the upper push rod 32that need to be kept to be also disposed adjacent to each other duringoperation, the operator does not need to make large movements duringoperation, and the control panel can be controlled conveniently andquickly.

When starting the garden tool, the two actions of starting the mainblade button 71 and starting the main blade pull rod 73 can be performedat intervals, but it needs to be completed within a certain time; afterstarting the self-propelled start paddle, the self-propelled startpaddle 81 can be released, and the speed regulating button 83 isadjusted in a short time, the self-propelled motor is still operatingnormally; thereby ensuring the simplicity of operation and the safety ofoperation.

The above embodiments are only used to illustrate the technicalsolutions of the present invention, not for limitation. Although thepresent invention is described in detail with reference to the preferredembodiments, ordinary technicians in the field should understand thatthe technical solutions of the present invention may be modified orsubstituted without departing from the spirit and scope of the technicalsolutions of the present invention.

What is claimed is:
 1. A garden tool, comprising: a main body; a walkingwheel mounted on the main body; a self-propelled motor for driving thewalking wheel; and a control panel disposed on the main body, thecontrol panel includes a self-propelled control assembly, and theself-propelled control assembly includes a self-propelled start paddleand a speed regulating button; wherein after the self-propelled startpaddle is activated, initiating self-propelled operation, theself-propelled start paddle can be released for a short time, the speedregulating button can be adjusted within the short time, theself-propelled start paddle can be re-activated within the short timeand after the speed regulating button is adjusted, and the garden toolmaintains the self-propelled operation.
 2. The garden tool according toclaim 1, wherein the self-propelled control assembly further comprises:a self-propelled switch connected to the self-propelled start paddle; apotentiometer connected to the speed regulating button; and a paddlereturn spring connected to the self-propelled start paddle; wherein whenthe self-propelled start paddle is activated the self-propelled switchsends a signal to start the self-propelled motor, and when the startpaddle is released the elastic force of the paddle return spring causesthe self-propelled start paddle to return to the initial position andthe self-propelled motor stops running; and the speed regulating buttonis provided with teeth, and the teeth of the speed regulating button areconnected to a speed regulating pinion connected to the potentiometer.3. The garden tool according to claim 2, wherein the self-propelledcontrol assembly further includes a damping spring, the damping springis fixed at a first end, a second end of the damping spring is extendedbetween respective teeth of the speed regulating button, and the secondend of the damping spring causes the speed regulating button to beactivated so that there is a sense of manipulation when adjusting thespeed regulating button.
 4. The garden tool according to claim 2,wherein the self-propelled control assembly further includes a dampingspring, the damping spring is fixed at a first end, a second end of thedamping spring is extended between respective teeth of the speedregulating button, and the second end of the damping spring preventsnon-operating rotation of the speed regulating button.
 5. The gardentool according to claim 1, wherein the control panel is mounted on themain body by a push rod, the control panel further includes an upperpanel and a lower panel, and the upper panel and the lower paneltogether form a mounting portion for mounting the control panel on thepush rod and a receiving portion for mounting a main blade controlassembly and the self-propelled control assembly.
 6. The garden toolaccording to claim 5, wherein the receiving portion is provided with afirst cavity and a second cavity above the first cavity, the firstcavity is formed by the upper panel and the lower panel, the main bladecontrol assembly is located in the first cavity, an upper cover isdisposed above the upper panel, the second cavity is formed by the uppercover and the upper panel, the self-propelled control assembly islocated in the second cavity, and a main blade button, a main blade pullrod, the self-propelled start paddle, and the speed regulating buttonare all located on a side of the control panel facing an operator of thegarden tool.
 7. The garden tool according to claim 6, wherein theself-propelled start paddle and the main blade pull rod are pivotallyconnected to the control panel, pressing the self-propelled start paddlerotates the self-propelled start paddle toward the main blade pull rod,pulling the main blade pull rod rotates the main blade pull rod towardthe self-propelled start paddle, and the self-propelled start paddle,the main blade pull rod and the push rod are arranged close to eachother, so that the operator can grasp the self-propelled start paddle,the main blade pull rod and the push rod at the same time.
 8. A lawnmower, comprising: a main body; at least one walking wheel mounted onthe main body; a main blade; a motor for driving the main blade; aself-propelled motor for driving the walking wheel; a self-propelledswitch; and a potentiometer; wherein a speed of the self-propelled motoris adjusted by the potentiometer, the lawn mower is in a self-propelledstate with the self-propelled motor working when the self-propelledswitch is active, and the lawn mower can maintain the self-propelledstate when the self-propelled switch is switched to inactive for a shorttime.
 9. The lawn mower according to claim 8, wherein if theself-propelled switch is closed for more than 1.5 seconds, and neither apotentiometer signal nor a self-propelled switch signal is detected, theself-propelled motor stops working.
 10. The lawn mower according toclaim 8, further comprising a self-propelled start paddle pivotallycoupled to the lawn mower, wherein the self-propelled switch istriggered by pressing the self-propelled start paddle.
 11. The lawnmower according to claim 10, further comprising a paddle return springconnected to the self-propelled start paddle, wherein the paddle returnspring causes the self-propelled start paddle to return to an initialposition when the self-propelled start paddle is released.
 12. The lawnmower according to claim 8, further comprising a speed regulating buttonand a speed regulating pinion, wherein the potentiometer is connected tothe speed regulating button by the speed regulating pinion.
 13. The lawnmower according to claim 8, wherein the speed of the self-propelledmotor can be set regardless of whether the self-propelled switch isactive or inactive.